Method of manufacturing light guide plate, lighting device, and display device

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United States of America Patent

PATENT NO 9939575
SERIAL NO

14778175

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Abstract

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A method of manufacturing a light guide plate includes steps of cutting a light guide plate base material with a frame-shaped die into a die-cut plate 50 including side surfaces each having a rectangular shape and performing thermal-imprinting process. In thermal-imprinting process, a processing surface 60a of a plate surface of a heated processing board 60 is pressed against one of the side surfaces 52 of the die-cut plate 50 to thermally imprint a pattern of the processing surface 60a of the processing board 60 on the one of the side surfaces 52 of the die-cut plate 50. The processing surface 60a having a shape that is recessed more at a portion thereof opposite a middle of a long dimension of the one of the side surfaces 52 than a portion thereof opposite ends of the long dimension of the one of the side surfaces 52 is pressed against the side surface 52.

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Patent Owner(s)

Patent OwnerAddress
SHARP KABUSHIKI KAISHA1 TAKUMI-CHO SAKAI-KU SAKAI CITY OSAKA 5908522 ?5908522

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ehara, Masanori Yonago, JP 3 7
Hirayama, Yoshinobu Osaka, JP 27 428
Kageyama, Masaki Yonago, JP 10 106
Takemoto, Tetsuyuki Osaka, JP 4 33

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